JP4993130B2 - Liquid ejecting head and liquid ejecting apparatus - Google Patents

Description

  The present invention relates to a liquid ejecting head that ejects liquid and a liquid ejecting apparatus including the same, and more particularly to an ink jet recording head and an ink jet recording apparatus that eject ink as liquid.

  In an ink jet recording head, which is a typical example of a liquid ejecting head, generally, an ink supply needle serving as an ink supply body that is detachably inserted into an ink cartridge from a liquid storage means filled with ink. Ink is supplied to the head body via an ink flow path formed in a supply member such as a cartridge case that holds the ink cartridge, and the head is driven by driving pressure generating means such as a piezoelectric element provided in the head body. The ink supplied to the main body is ejected from the nozzle.

In such an ink jet recording head, if bubbles that are present in the ink of the ink cartridge or bubbles that are mixed in the ink when the ink cartridge is attached / detached are supplied to the head body, such as dot dropout due to the bubbles. There is a problem that defective discharge occurs. In order to solve such a problem, a filter for removing bubbles or dust in the ink is provided between an ink supply needle inserted into the ink cartridge and a supply member (cartridge case) ( For example, see Patent Document 1).
JP 2000-2111130 A

  The ink jet recording head as described above has been conventionally miniaturized, but further miniaturization is desired. However, in the configuration as in Patent Document 1, since the filter is provided in the region where the ink supply needle of the supply member is fixed, the supply member needs to have a size corresponding to the area of the filter. There is a problem that it is difficult to reduce the size.

  For example, it is conceivable to reduce the size of the supply member by shortening the interval between the ink supply needles. However, since an area for welding the ink supply needle to the supply member together with the filter is necessary, the interval between the adjacent ink supply needles is required. Is difficult to shorten. Further, for example, it is conceivable to reduce the area of the filter itself. However, since the dynamic pressure increases, there is a problem that the driving voltage for driving the pressure generating means such as a piezoelectric element has to be increased. Further, when the ink supply needle and the supply member are fixed by thermal welding, there is a possibility that a gap is formed between them, and there is a problem that ink leaks from this gap. Furthermore, if the filter and the ink supply needle are individually fixed to the supply member, there is a problem that the manufacturing cost becomes high.

  Such a problem exists not only in an ink jet recording head but also in a liquid ejecting head that ejects liquid other than ink.

  SUMMARY An advantage of some aspects of the invention is that it provides a liquid ejecting head and a liquid ejecting apparatus that can reduce the size of the head.

The present invention that solves the above-described problems includes a head main body having a plurality of nozzles that eject liquid, a first member, a second member, and a third member provided with a liquid supply path that supplies the liquid to the head main body. And a supply member including the filter member, wherein the supply member is provided between the first member and the second member, and includes a filter unit at a position corresponding to a predetermined liquid supply path . 1 filter, and a second filter provided between the second member and the third member and provided with a filter portion at a position corresponding to a predetermined liquid supply path . The filter portion of the second filter and the filter portion of the second filter are provided on different surfaces, and the first member and the second member are disposed between the first member and the second member. The first filter is sandwiched between the first member and the second member. Member, said first outer portion formed by integral molding for fixing the second member and the first filter is provided et al is, between the third member and the second member, Formed by integral molding for fixing the second member, the third member, and the second filter in a state where the second filter is sandwiched between the second member and the third member. And the first outer portion is provided around a region sandwiched between the first member and the second member of the first filter. the second outer portion wherein the second member the third member and et provided around the clamping area is in, and is integrally with said first outer portion and the second outer portion It is formed, by this that connected with the space communicating portion provided on the second member A liquid-jet head according to claim.

  Further, the first filter is provided so as to protrude to the outside of the region sandwiched between the first member and the second member, and the first member and the second member of the first filter are provided. A part of the region protruding to the outside of the region sandwiched by the first outer portion is sandwiched by the first outer portion, and the second filter is sandwiched between the second member and the third member. A part of the region that protrudes to the outside and projects to the outside of the region sandwiched between the second member and the third member of the second filter is sandwiched by the second outer portion. Preferably it is. Accordingly, the first and second filters can be reliably held by the first and second outer portions, and the first and second filters can be prevented from being relied upon or peeled off.

  The first filter and the second filter are provided with a plurality of through portions, and a portion corresponding to the through portion of the first filter is sandwiched by the first outer portion, and the second filter It is preferable that the part corresponding to the said penetration part of this filter is clamped by the said 2nd outer part. Thereby, when forming the 1st and 2nd outer parts by integral molding, these 1st and 2nd outer parts are certainly formed in the state which penetrated each penetration part. Therefore, the liquid supply path can be reliably sealed, and leakage of other liquids can be prevented.

  In addition, it is preferable that the first outer portion and the second outer portion are present at different positions in plan view of the supply member. Thereby, the first and second outer portions can be provided close to each liquid supply path, and the liquid supply path can be more reliably sealed to prevent leakage of liquid and the like.

  Further, the liquid supply path is provided with filter chambers each having a wide flow path before and after the first and second filters, and the filter chambers of any of the flow paths have substantially the same shape. Preferably there is. As a result, the pressure loss and exhaustability in each filter chamber are substantially constant regardless of the flow path.

  Each of the first and second filters is preferably provided continuously over a plurality of liquid supply paths. Thereby, the first and second filters are reliably held between the members.

  Furthermore, the present invention provides a liquid ejecting apparatus including such a liquid ejecting head. According to the present invention, a downsized liquid ejecting apparatus can be realized.

Hereinafter, the present invention will be described in detail based on embodiments.
FIG. 1 is a schematic perspective view of an ink jet recording apparatus according to an embodiment of the present invention. As shown in FIG. 1, an ink jet recording apparatus 10 that is an example of a liquid ejecting apparatus of the present invention has an ink jet recording head 11 that is an example of a liquid ejecting head that ejects ink droplets fixed to a carriage 12. The head 11 has an ink cartridge 13 that is a liquid storage unit in which a plurality of different color inks such as black (B), light black (LB), cyan (C), magenta (M), and yellow (Y) are stored. Are fixed detachably. The ink cartridge 13 includes a plurality of storage portions 13a in which inks of the respective colors are stored. For example, in the present embodiment, four storage portions 13a are arranged around the storage portion 13a provided in the center. ing.

  The carriage 12 on which the recording head 11 is mounted is provided on a carriage shaft 15 attached to the apparatus main body 14 so as to be movable in the axial direction. Then, the driving force of the driving motor 16 is transmitted to the carriage 12 via a plurality of gears and a timing belt 17 (not shown), so that the carriage 12 is moved along the carriage shaft 15. On the other hand, the apparatus main body 14 is provided with a platen 18 along the carriage shaft 15, so that a recording medium S such as paper fed by a paper feeding device (not shown) is conveyed on the platen 18. ing.

  Here, the recording head 11 according to the present embodiment will be described. FIG. 2 is a schematic perspective view of an ink jet recording head which is an example of the liquid ejecting head according to the present embodiment. FIG. 3 is a top view schematically showing the ink jet recording head, and FIG. 4 is a view showing a main part of the supply member, and is a cross-sectional view taken along line AA ′ of FIG. FIG. 5 is a plan view of the first and second filters.

  As shown in FIGS. 2 to 5, the recording head 11 includes a supply member 30 having a flow path for supplying ink from an ink cartridge 13 that is a liquid storage unit, and the supply member 30 on the side opposite to the ink cartridge 13. And a head main body 50 fixed to the surface.

  The supply member 30 is provided on one surface side of the cartridge case 33 including the first member 31 and the second member 32 and the cartridge case 33 (second member 32), for example, and supplies a plurality of inks. A supply body 35 which is a third member integrally having a needle 34; a first filter 36 disposed between a first member 31 and a second member 32 constituting the cartridge case 33; and a cartridge. A second filter 37 is provided between the case 33 and the supply body 35.

  The cartridge case 33 is composed of a plurality of divided members, in the present embodiment, two divided members, the first member 31 and the second member 32 described above. The first member 31 and the second member 32 include the divided member. It is fixed. The supply member 35 is fixed to the second member 32, and the head main body 50 is fixed to the first member 31. Also, the cartridge case 33 has one end opened on the surface on the supply body 35 side and the other end opened on the surface on the head main body 50 side, and a plurality of ink supplies for supplying ink from the ink cartridge 13 to the head main body 50. A path 38 is provided. That is, each ink supply path 38 is provided through the first member 31 and the second member 32 independently for each color ink.

  The supply body 35 integrally includes a plurality (five) of ink supply needles 34 that are respectively inserted into the storage portions 13a of the ink cartridges 13 in which the inks of the respective colors are stored. Each ink supply needle 34 is formed with a through passage 39, and each reservoir 13 a of the ink cartridge 13 and the ink supply passage 38 are communicated with each other through the through passage 39.

  The first filter 36 is sandwiched between the first member 31 and the second member 32, and is disposed at a position corresponding to a predetermined ink supply path 38 so that bubbles in the ink in the ink supply path 38 are removed. It has a filter part 36a for removing foreign matter. For example, in the present embodiment, the first filter 36 is provided with a through hole 36b at a position corresponding to the ink supply path 38A communicating with the ink supply needle 34A disposed in the central portion of the supply body 35. Filter portions 36a are provided at positions corresponding to the ink supply paths 38B arranged around the needle 34A (see FIG. 5A).

  The second filter 37 is sandwiched between the second member 32 constituting the cartridge case 33 and the supply body 35, and is disposed at a position corresponding to a predetermined ink supply path 38 to be in the ink supply path 38. Filter part 37a for removing bubbles and foreign matters in the ink. For example, in the present embodiment, the second filter 37 has a position corresponding to the ink supply path 38 </ b> A communicating with the ink supply needle 34 </ b> A disposed in the center of the supply body 35, contrary to the first filter 36. A filter portion 37a is provided, and through holes 37b are provided at positions corresponding to the ink supply paths 38B communicating with the ink supply needles 34B arranged around the ink supply needles 34A (FIG. 5B). )reference).

  That is, in the present invention, the filter portions 36a and 37a for removing bubbles and foreign matters in the ink are not provided on the same plane, but two different surfaces, in the present embodiment, the cartridge case 33 constituting the cartridge case 33. The connecting portion between the first member 31 and the second member 32 and the connecting portion between the cartridge case 33 and the supply body 35 are provided.

  By providing the filter portions 36a and 37a on the different surfaces in this way, the interval between the filter portions 36a and 37a provided on the different surfaces can be reduced, so that the supply member 30 can be downsized. . Further, as the supply member 30 is downsized, the entire recording head 11 can be downsized. Further, while reducing the size of the supply member 30, the area of the filter parts 36 a and 37 a can be expanded to reduce the dynamic pressure, thereby reducing the driving voltage of the pressure generating means provided in the head body 50.

  Note that a filter chamber 40A having a larger inner diameter (wider flow path) than other regions is formed at a connection portion between the penetrating path 39A of the ink supply needle 34A and the ink supply path 38A of the second member 32. The filter portion 37a of the second filter 37 is arranged in the filter chamber 40A. For example, in this embodiment, the filter chamber 40A is formed so that the inner diameter becomes larger toward the second filter 37 side. Further, a filter chamber 40B is formed at a connection portion between the ink supply path 38B of the first member 31 and the ink supply path 38B of the second member 32, and the filter of the first filter 36 is formed in the filter chamber 40B. The part 36a is arranged. These filter chambers 40A and 40B are provided to ensure a large area of the filter portions 37a and 36a and to make the resistance when ink passes as small as possible.

  In this embodiment, the filter chamber 40A provided at the connection portion between the ink supply needle 34A and the second member 32 and the filter chamber 40B provided at the connection portion between the first member 31 and the second member 32 are used. Are formed in different shapes, but are preferably formed in substantially the same shape. As a result, the pressure loss and exhaust performance in the filter chambers 40A and 40B in the ink supply passages 38A and 38B can be made substantially constant, and the ink supply properties can be made uniform to make the ink droplet ejection characteristics uniform. Can do.

Here, the first member 31 and the second member 32 constituting the cartridge case 33 are connected portions of the first member 31 and the second member 32 with the first filter 36 sandwiched therebetween. It is fixed by the first outer part 41 provided in the. That is, the first member 31 and the second member 32 and the first filter 36 are integrally fixed by the first outer portion 41. In addition, the second member 32 and the supply body 35 constituting the cartridge case 33 are provided at the connection portion between the second member 32 and the supply body 35 with the second filter 37 sandwiched therebetween. 2 is fixed by the outer part 42. That is, the second filter 37 is integrally fixed by the second outer portion 42 together with the second member 32 and the supply body 35.

  Specifically, on the outer periphery of the connection portion between the first member 31 and the second member 32, a space portion formed by groove portions formed in the first member 31 and the second member 32, respectively. 43 is formed, and the first filter 36 has a size protruding into the space 43. Further, in the present embodiment, the space portions 44 are provided not only at the outer periphery of the connection portion between the first member 31 and the second member 32 but also around each ink supply path 38. The first filter 36 located in the space 44 is provided with a plurality of through portions 45 in the circumferential direction of the ink supply path 38 (see FIG. 5A). The first member 31 and the second member 32 and the first filter 36 are integrally fixed by the first outer portion 41 made of a resin material provided in the space portions 43 and 44. Has been. That is, the first outer portion 41 is provided in the peripheral portion of the region of the first filter 36 sandwiched between the first member 31 and the second member 32, and the first member 31 and the second member The member 32 and the first filter 36 are fixed integrally.

  A space 46 is also provided on the outer periphery of the connection portion between the second member 32 and the supply body 35, and the second filter 37 has a size that projects into the space 46. In the present embodiment, not only the outer periphery of the connection portion between the second member 32 and the supply body 35 but also the space 47 is provided around each ink supply path 38 (see FIG. 3). A plurality of penetrating portions 48 are provided in the circumferential direction of the ink supply path 38 in the second filter 37 located in the space portion 47 (see FIG. 5B). The second member 32 and the supply body 35 and the second filter 37 are integrally fixed by a second outer portion 42 made of a resin material provided in each of the space portions 46 and 47. . That is, the second outer portion 42 is provided in the peripheral portion of the region of the second filter 37 sandwiched between the second member 32 and the supply body 35, and the second member 32, the supply body 35, and the second filter 37. Two filters 37 are fixed integrally.

  Such a first outer portion 41 is formed by integrally molding together with the first member 31, the second member 32 and the first filter 36. Similarly, the second outer portion 42 is also formed by integrally molding together with the second member 32, the supply body 35 and the second filter 37. The supply body 35 and the first member 31 are provided with filling holes 49 communicating with the space portions 44 and 47 provided around the respective ink supply paths 38. The first and second outer portions 41 and 42 are formed by filling the space portions 44 and 47 around the ink supply path 38 with a resin material.

  Thus, in the configuration of the present invention, the cartridge case 33 constituted by the first and second members 31 and 32 and the supply body 35 by the first and second outer portions 41 and 42 formed by integral molding. Since the first and second filters 36 and 37 are integrated, the region for welding the supply body 35 and the first and second filters 36 and 37 to the cartridge case 33 becomes unnecessary. The interval between the ink supply paths 38 can be further shortened to reduce the size of the head. Further, even if the head is downsized, the filter portions 36a and 37a can be secured in a desired area, so that an increase in dynamic pressure can be suppressed.

  Further, the second member 32 and the first filter 36 can be simultaneously fixed to the first member 31 by the first outer portion 41, and the second member 32 can be fixed to the second member 32 by the second outer portion 42. Since the second filter 37 and the supply body 35 can be fixed at the same time, the manufacturing process can be simplified and the cost can be reduced.

  Further, the first member 31 and the second member 32 constituting the cartridge case 33 are fixed by the first outer portion 41 and the cartridge case 33 and the supply body 35 are fixed by the second outer portion 42. Therefore, it is possible to prevent a gap from being formed between the two members, and to prevent the ink in the ink supply path 38 from leaking outside through the gap.

  The first outer portion 41 and the second outer portion 42 are preferably present at different positions in plan view of the supply member 30. In other words, in the plan view of the supply member 30, a space portion 44 formed between the first member 31 and the second member 32 and a space provided between the supply body 35 and the second member 32. It is preferable that the part 47 exists in a different position. Thereby, each ink supply path 38 can be reliably sealed to prevent the ink in the ink supply path 38 from leaking outside.

  A head body 50 is provided on the other side of the ink supply path 38 of the supply member 30, that is, on the side opposite to the supply body 35. Here, an example of the head body 50 will be described. FIG. 6 is an exploded perspective view of the head body, and FIG. 7 is a cross-sectional view of the head body.

  As shown in the figure, the flow path forming substrate 60 constituting the head body 50 is made of a silicon single crystal substrate in this embodiment, and an elastic film 61 made of silicon dioxide is formed on one surface thereof. The flow path forming substrate 60 is formed with two rows in which pressure generation chambers 62 partitioned by a plurality of partition walls are arranged in parallel in the width direction by anisotropic etching from the other side. Further, on the outside in the longitudinal direction of the pressure generation chambers 62 in each row, a communication portion 66 that communicates with a reservoir portion 64 provided on the reservoir forming substrate 63 and constitutes a reservoir 65 that serves as a common ink chamber for each pressure generation chamber 62. Is formed. The communication portion 66 is in communication with one end portion in the longitudinal direction of each pressure generating chamber 62 through the ink supply path 67. That is, in the present embodiment, the pressure generation chamber 62, the communication portion 66, and the ink supply path 67 are provided as the liquid flow paths formed on the flow path forming substrate 60.

  Further, a nozzle plate 69 in which nozzle openings 68 are formed is fixed to the opening surface side of the flow path forming substrate 60 by an adhesive 70. The nozzle opening 68 of the nozzle plate 69 is formed at a position communicating with the pressure generation chamber 62 on the side opposite to the ink supply path 67. In this example, since two rows in which the pressure generation chambers 62 are arranged in parallel are provided on the flow path forming substrate 60, two rows of nozzle rows in which nozzle openings 68 are arranged in parallel are provided in one head body 50. Examples of such a nozzle plate 69 include a silicon single crystal substrate and a metal substrate such as stainless steel (SUS).

  On the other hand, on the side opposite to the opening surface of the flow path forming substrate 60, on the elastic film 61, a lower electrode film made of metal, a piezoelectric layer made of a piezoelectric material such as lead zirconate titanate (PZT), A piezoelectric element 71 is formed by sequentially laminating an upper electrode film made of metal.

  On the flow path forming substrate 60 on which such a piezoelectric element 71 is formed, a reservoir forming substrate 63 having a reservoir portion 64 constituting at least a part of the reservoir 65 is joined. The reservoir portion 64 is formed, for example, through the reservoir forming substrate 63 in the thickness direction and across the width direction of the pressure generating chamber 62, and communicates with the communicating portion 66 of the flow path forming substrate 60 as described above. Thus, a reservoir 65 serving as an ink chamber common to the pressure generating chambers 62 is configured.

  A piezoelectric element holding portion 72 having a space that does not hinder the movement of the piezoelectric element 300 is provided in a region of the reservoir forming substrate 63 facing the piezoelectric element 300.

  Further, on the reservoir forming substrate 63, a drive circuit 73 composed of a semiconductor integrated circuit (IC) or the like for driving each piezoelectric element 71 is provided. Each terminal of the drive circuit 73 is connected to a lead wire drawn from the individual electrode of each piezoelectric element 71 via a bonding wire or the like (not shown). Each terminal of the drive circuit 73 is connected to the outside via an external wiring 74 such as a flexible printed circuit (FPC), and receives various signals such as a print signal from the outside via the external wiring 74. Yes.

  In addition, a compliance substrate 75 is bonded on the reservoir forming substrate 63. In the region of the compliance substrate 75 facing the reservoir 65, an ink introduction port 76 for supplying ink to the reservoir 65 is formed by penetrating in the thickness direction. Further, the region of the compliance substrate 75 other than the ink introduction port 76 in the region facing the reservoir 65 is a flexible portion 77 formed thin in the thickness direction, and the reservoir 65 is sealed by the flexible portion 77. Has been. Compliance is given to the reservoir 65 by the flexible portion 77.

  A head case 78 is fixed on the compliance substrate 75. The head case 78 communicates with the ink introduction port 76 and also communicates with the ink supply passage 38 of the supply member 30, and is provided with an ink supply communication passage 79 that supplies ink from the supply member 30 to the ink introduction port 76. . In the head case 78, a groove 80 is formed in a region facing the flexible portion 77 of the compliance substrate 75, and the flexible portion 77 is appropriately deformed. The head case 78 is provided with a drive circuit holding portion 81 penetrating in the thickness direction in a region facing the drive circuit 73 provided on the reservoir forming substrate 63, and the external wiring 74 is provided with a drive circuit hold. The drive circuit 73 is connected through the portion 81.

  Such a head main body 50 takes in ink from the ink cartridge 13 from the ink supply path 38 through the ink supply communication path 79 and the ink introduction port 76, and fills the interior from the reservoir 65 to the nozzle opening 68 with ink. Thereafter, in accordance with a recording signal from the drive circuit 73, a voltage is applied to each piezoelectric element 71 corresponding to each pressure generating chamber 62 to cause the piezoelectric element 71 to bend and deform, whereby the pressure in each pressure generating chamber 62 increases. Ink droplets are ejected from the nozzle openings 68.

  Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment.

  For example, in the above-described embodiment, the first outer portion 41 and the second outer portion 42 are provided completely independently. That is, the first outer part 41 and the second outer part 42 are separately molded. However, for example, as shown in FIG. 8, the space 44 provided in the connection portion between the first member 31 and the second member 32 and the connection portion between the supply body 35 and the second member 32 are provided. The space communication portion 100 that communicates with the space portion 47 provided is provided in the second member 32, and the first outer portion 41 and the second outer portion 42 are simultaneously molded and substantially integrated. Also good. Thus, by providing the space communication part 100 and molding at once, the resin parts are more reliably filled in the space parts 44 and 47, and the first and second outer parts 41 and 42 are formed satisfactorily. be able to.

  Moreover, in the above-mentioned embodiment, although the 1st filter and the 2nd filter are formed in the magnitude | size which the peripheral part protrudes in a space part, it is not limited to this, A 1st filter and The size of the second filter is such that its peripheral edge does not protrude into the space, and the first filter and the second filter are sandwiched between the first and second members constituting the supply body and the cartridge case. You may be made to do. Even in such a configuration, of course, each member can be fixed well. Further, for example, a plurality of filter portions are integrally formed in the second filter, but, of course, each filter portion may be independent.

  In the above-described embodiment, the plurality of ink supply needles 34 are integrally provided in the supply body 35. However, the present invention is not limited to this, and each ink supply needle may be independent. In this case, each of the ink supply needles corresponds to a supply body.

  In the above-described embodiment, the ink jet recording head 11 having the plurality of ink supply needles 34 has been exemplified. However, the arrangement of the plurality of ink supply needles is not particularly limited, and for example, even if they are arranged in a line. Good.

  In the above-described embodiment, the example in which the ink cartridge 13 as the liquid storage unit is configured to be detachable from the cartridge case 33 has been described. However, the present invention is not limited to this. Etc. may be provided at a position different from the recording head 11, and the liquid storage means and the recording head 11 may be connected via a supply pipe such as a tube. That is, in the above-described embodiment, the configuration in which the needle-like ink supply needle 34 is provided as the supply body is illustrated, but the supply body (ink supply needle) is not limited to the needle-like one.

  Furthermore, in the above-described embodiment, the configuration in which one head main body 50 is provided for the plurality of ink supply paths 38 is exemplified, but a plurality of head main bodies may be provided for each ink color. In such a case, each ink supply path communicates with each head body, that is, each ink supply path is provided so as to communicate with each nozzle row in which nozzle openings provided in each head body are arranged in parallel. It may be. Of course, the ink supply path does not have to communicate with each nozzle array, and one ink supply path may communicate with a plurality of nozzle arrays, and one nozzle array is divided into two, The ink supply path may be in communication. That is, the ink supply path only needs to communicate with a nozzle opening group including a plurality of nozzle openings.

  Further, in the above-described embodiment, the present invention has been described by exemplifying the ink jet recording head 11 that ejects ink droplets. However, the present invention is widely intended for all liquid ejecting heads. Examples of the liquid ejecting head include a recording head used for an image recording apparatus such as a printer, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, an organic EL display, and an electrode formation such as an FED (field emission display). Electrode material ejecting heads used in manufacturing, bioorganic matter ejecting heads used in biochip production, and the like.

1 is a schematic perspective view of a recording apparatus according to an embodiment of the present invention. 1 is a schematic perspective view of a recording head according to an embodiment of the present invention. FIG. 3 is a top view of a recording head according to an embodiment of the invention. It is sectional drawing which shows the principal part of the supply member which concerns on one Embodiment of this invention. It is a top view showing the 1st and 2nd filter concerning one embodiment of the present invention. It is a disassembled perspective view which shows the head main body which concerns on one Embodiment of this invention. It is sectional drawing which shows the head main body which concerns on one Embodiment of this invention. It is sectional drawing which shows the modification of the supply member which concerns on one Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Inkjet recording device, 11 Inkjet recording head (recording head), 13 Ink cartridge, 13a Storage part, 30 Supply member, 31 1st member, 32 2nd member, 33 Cartridge case, 34 Ink supply needle, 35 Supply body, 36 first filter, 37 second filter, 36a, 37a filter section, 36b, 37b through-hole, 38 ink supply path, 39 through path, 40A, 40B filter chamber, 41 first outer section, 42 2nd outer part, 50 head main body, 300 piezoelectric element

Claims (7)

A head body having a plurality of nozzles for ejecting liquid, and a supply member including a first member, a second member, and a third member provided with a liquid supply path for supplying the liquid to the head body. Equipped,
The supply member is
A first filter provided between the first member and the second member and including a filter portion at a position corresponding to a predetermined liquid supply path ;
A second filter provided between the second member and the third member and including a filter unit at a position corresponding to a predetermined liquid supply path ;
The filter part of the first filter and the filter part of the second filter are provided on different surfaces,
Between the first member and the second member, the first member in the state where the first filter is sandwiched between the first member and the second member, first outer portion is provided we are formed by integral molding for fixing the second member and the first filter,
Between the second member and the third member , the second member in the state where the second filter is sandwiched between the second member and the third member, A second outer part formed by integral molding for fixing the third member and the second filter is provided;
In addition, the first outer portion is provided around a region sandwiched between the first member and the second member of the first filter, and the second outer portion is the second filter. member and the third member and et provided around the clamping area is in the,
The liquid ejecting head, wherein the first outer portion and the second outer portion are integrally formed and are connected by a space communication portion provided in the second member . The first filter is provided to protrude to the outside of the region sandwiched between the first member and the second member, and is sandwiched between the first member and the second member of the first filter. A part of the region protruding to the outside of the formed region is sandwiched by the first outer portion, and to the outside of the region where the second filter is sandwiched between the second member and the third member A part of the region that protrudes to the outside of the region sandwiched between the second member and the third member of the second filter is sandwiched by the second outer portion. The liquid ejecting head according to claim 1 . The first filter and the second filter are provided with a plurality of through portions, and a portion corresponding to the through portion of the first filter is sandwiched by the first outer portion, and the second filter 3. The liquid jet head according to claim 1, wherein a portion corresponding to the penetrating portion is sandwiched between the second outer portions. It said first outer portion and said second outer portion, the liquid ejecting head according to any one of claim 1 to 3, characterized in that in different positions in plan view of the feed member. The liquid supply path is provided with filter chambers each having a wide flow path before and after the first and second filters, and the filter chambers of any of the flow paths have substantially the same shape. liquid jet head according to any one of claim 1 to 4, characterized in. Wherein the first and the respective second filter, a liquid ejecting head according to any one of claim 1 to 5, characterized in that is provided continuously over a plurality of liquid supply paths. A liquid ejecting apparatus comprising the liquid ejecting head according to any one of claims 1-6.

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